Piston ring



Aug. 11, 1925. Y 1,548,948

PPPPPPPPP NG NNNNNN O R Patented ug. ll, 1925.

SIMON HIRSHFIELD,

OIF NEW YOR, N. Y.

PISTON BNGV.

Application filed July 5,

To all whom it may concern.'

Be it known that ll, SIMON HIRSHFIELD, a citizen of the United States of America, residing at New York city, county of Bronx, State of New York, have invented certain new and useful mprovements in Fiston Rings, of which the followingl is a specification.

rllhis invention relates to piston rings and in particular to a type having embedded therein an absorbent material.

An 'object of the invention is to provide a piston ring which will collect the excess oil on the walls of the cylinder and prevent the same from entering the combustion chamber. g

A particular object of the invention is to provide a piston ring in which is embedded an oil absorbing wool composition or the like which will expand or swell to close any openings between the ringand the walls ofy the cylinder or between 'the ring and the top of the piston groove in which the ring is seated.

A further object isto so place the embedded composition that it will prevent any leakage of the oil around the piston ring grooves which would ultimately mix with the explosive compound to destroy the value of the same. V

Referring to the drawing wherein li have shown a preferred embodiment of my invention,

Figure 1 is a top plan view of a iston ring showing the method of applying 1n the upper side thereof my absorbent material,

Figure 2 is a view of the ring in side elevation a part thereof being shown broken to disclose the filling in the upper side,l the additional peripheral filling being fully shown.

Figure 3 is a section taken through a portion of an engine cylinder piston and piston ring showing the absorbent material holding grooves in section.'

Figure 4 is a view similar to Figure 3 showing a different shape of groove in the piston ring which will retain t-he filler; and,

Figure 5, is a viewfsimilar to 'Figure 3 showing a still further method of cutting a groove so that the fillerwill be held in place.l

1924:. Serial` No. 724,195.

Referring to the drawing in detail 5 indicates a piston ring of the type used generally in internal combustion engine pistons having the usual break 6 therein for the purpose of allowing the ring to spring open to keep in engagement with the wall of the cylinder.

During the constant rubbing of the piston rings against the wall 'of the cylinder wear occurs bet-Ween the two at different points, 6o and the lubricating oil seeps through into the combustion chamber and retards vthe efiicient operation of the engine. In order to prevent the leakage of oil between the piston ring and iston or cylinder wall, l provide et a groovell in the periphery of the piston ring 5 and a like groove 8 in the tolp of the ring. llnto these grooves 7 and 8 pack a filling 9 of absorbent wool compositlon or the like, which when saturated with oil will 7@ swell and protrude beyond the ring to engage the adjacent wall. lin Figure 3 of the drawing these fillings 9 engage the cylinder wall as at 10 and the top of the piston ring groove 11 in the piston 12. rlhis swellto ing action of the filler 9 prevents any passage of oil into the combustion chamber either between the ring and the Wall of the cylinder, or around the ring.

In order to guard against the filling fallto ing out or working out of the grooves, ll may form said grooves after the manner shown in Figures 4 and 5, that is, li may make the bottom of the groove wider than the top thereof as at 13, or l may provide `a T- slotted groove 14. Y

The filling, however, will not be liable to fall out after it has once been saturated with oil and subjected to heat.

It will be particularly noted that the pro- 9U' truding lling will engage its opposite wall to prevent the passage of oil into the cdmbustion chamber. The filling in the top of the ring swells and engages the top wall of the ring groove of the piston. This prevents seepage of oil behind the piston rlng and over the top thereof.

It will be seen therefore that I have provided an improved piston ring in which is embedded a filling of absorbent material 100 which will swell and take up the wear of the rings and prevent the lubricating oil from entering the combustion chamber. Having described my invention, what 5' claim is:

1. AA piston ring having e, groove cut in grooves adapted to swell and protrude beyond the surfaes of the ring'.

2. A piston ring' having a, T-shaped groove cut in the periphery and in one side face thereof, and a, filler of absorbent material in said grooves adapted to, swell when satuthe peripheral and side faces thereof, the `mated with oil, so that it will protrude bebottoms of the grooves being Wider than the `tops, and an oil absorben-l ller in said yond the surface of the ring.

SilMON HIRSHFIELD. 

